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You searched for: subject:"prototypes"
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[audio]Prototypes Kaleidoscope
Prototypes - Kaleidoscope
Keywords: Prototypes - Kaleidoscope
Downloads: 9
[texts]Selection of Lockheed Martin's Preferred TSTO Configurations for the Space Launch Initiative - Hopkins, Joshua B
Lockheed Martin is developing concepts for safe, affordable Two Stage to Orbit (TSTO) reusable launch vehicles as part of NASA s Space Launch Initiaiive. This paper discusses the options considered for the design of the TSTO, the impact of each of these options on the vehicle configuration, the criteria used for selection of preferred configurations, and the results of the selection process. More than twenty configurations were developed in detail in order to compare optioiis such as propellant ...
Keywords: RESEARCH AIRCRAFT; HISTORIES; PROTOTYPES
Downloads: 154
[texts]Photographic Analysis Technique for Assessing External Tank Foam Loss Events - Rieckhoff, T. J.
A video camera and recorder were placed inside the solid rocket booster forward skirt in order to view foam loss events over an area on the external tank (ET) intertank surface. In this Technical Memorandum, a method of processing video images to allow rapid detection of permanent changes indicative of foam loss events on the ET surface was defined and applied to accurately count, categorize, and locate such events.
Keywords: MECHANIZATION; PROGRAMMING LANGUAGES; PROVING; AXIOMS; PROTOTYPES
Downloads: 55
[texts]A Study of the Non-Thermal X-Ray Emission of Shell-Type Supernova Remnants - Allen, Glenn E
The term of the second year of the award is the period from March 15, 2001 to March 14, 2002. As was the specified goal of the second year, we analyzed the spatial and spectral X-ray data for several young supernova remnants. I published a paper about an analysis of the ROSAT, ASCA, and RXTE data for the supernova remnant SN 1006. A copy of this paper is enclosed. As described in the paper, we believe that we accurately modeled the nonthermal X-ray emission from the remnant...
Keywords: PROPULSION; REUSABLE LAUNCH VEHICLES; PROTOTYPES; ROCKET ENGINES
Downloads: 67
[texts]Development of infrared sensors using energy transfer/energy upconversion processes: Study of laser excited fluorescence in rare Earth ion doped crystals - Nash-Stevenson, S. K.
A summary is presented of the spectroscopic study of three systems: LaF3:Ho(3), LaF3:Er(3) and CaF2:Nd(3). When the D levels of Ho(3) in LaF3 were resonantly excited with a laser beam of 640 nm, upconverted emissions were detected from J (416 nm), F (485 nm), and E (546 nm) levels. Energy upconverted emissions were also observed from F and E levels of Ho(3) when the material was excited with an 800 nm near infrared laser...
Keywords: SCHEDULES; SPACECRAFT CONTROL; TELEMETRY; PAYLOADS; PROTOTYPES; WORKSTATIONS
Downloads: 79
[texts]Design, development and prototype fabrication of an area hydrogen detector monthly progress report, 1 oct. 1963 - 31 oct. 1963 - Michaels, P. A
Hydrogen detector
Keywords: FABRICATION; GAS DETECTORS; HYDROGEN; OPTICAL SCANNERS; PROTOTYPES; DETECTOR; HYDROGEN
Downloads: 103
[texts]A model for merging software prototypes - Dampier, David A.;Luqi.
Cover title
Keywords: PROTOTYPES; SOFTWARE ENGINEERING; COMPUTER PROGRAMS; COMPUTER PROGRAM VERIFICATION; ASSIMILATION
Downloads: 21
[texts]A Framework for Managing Inter-Site Storage Area Networks using Grid Technologies - Kobler, Ben
The NASA Goddard Space Flight Center and the University of Maryland Institute for Advanced Computer Studies are studying mechanisms for installing and managing Storage Area Networks (SANs) that span multiple independent collaborating institutions using Storage Area Network Routers (SAN Routers). We present a framework for managing inter-site distributed SANs that uses Grid Technologies to balance the competing needs to control local resources, share information, delegate administrative access, a...
Keywords: INTERFEROMETERS; METROLOGY; DEGREES OF FREEDOM; THEODOLITES; PROTOTYPES; SENSITIVITY; ROTATION; ELEVATION
Downloads: 91
[texts]Coated oxidizers for stability in space propulsion rockets - NON
No Abstract Available
Keywords: ENGINE TESTS; PROTOTYPES; STIRLING CYCLE; AUTOMOBILE ENGINES; HELIUM
Downloads: 100
[texts]xerox :: sdd :: memos 1977 :: 19771013 October Status Report For Advanced Design And User Prototypes Group
From the bitsavers.org collection, a scanned-in computer-related document.xerox :: sdd :: memos 1977 :: 19771013 October Status Report For Advanced Design And User Prototypes Group
Keywords: design; prototypes; prototyping; ibm; user; walkthrough; specification; janus; interface; smalltalk
Downloads: 20
[texts]Premixed Prevaporized Combustor Technology Forum - NON
The Forum was held to present the results of recent and current work intended to provide basic information required for demonstration of lean, premixed prevaporized combustors for aircraft gas turbine engine application. Papers are presented which deal with the following major topics: (1) engine interfaces; (2) fuel-air preparation; (3) autoignition; (4) lean combustion; and (5) concept design studies.
Keywords: CENTRIFUGES; PIEZOELECTRICITY; SHAKERS; ACTUATORS; EARTHQUAKES; PROTOTYPES; SEISMIC WAVES
Downloads: 137
[audio]Prototypes on AFTERSHOCK
A radio interview with Prototypes on the AFTERSHOCK program on 106.9 Vox FM Recorded on 19/2/14
Keywords: Prototypes; Vox FM; AFTERSHOCK; DJ Styx; 106.9
Downloads: 7
[texts]Ground-Laboratory to In-Space Effective Atomic-Oxygen Fluence Determined for DC 93-500 Silicone - deGroh, Kim K.
Surfaces on the leading edge of spacecraft in low Earth orbit (e.g., surface facing the velocity direction), such as on the International Space Station, are subject to atomic oxygen attack, and certain materials are susceptible to erosion. Therefore, ground-based laboratory testing of the atomic oxygen durability of spacecraft materials is necessary for durability assessment when flight data are not available...
Keywords: ROBUSTNESS (MATHEMATICS); RUNWAYS; PRECISION; PROTOTYPES; SPACING; AIRPORTS; ROUTES
Downloads: 105
[texts]NASA Technology Benefits Orthotics - Myers, Neill
Engineers at NASA's Marshall Space Flight Center (MSFC) in Huntsville, Alabama have designed a knee brace to aid in the rehabilitation of medical patients. The device, called the Selectively Lockable Knee Brace, was designed for knee injury and stroke patients but may potentially serve in many more patient applications. Individuals with sports related injuries, spinal cord injuries and birth defects, such as spina bifida, may also benefit from the device...
Keywords: BROADCASTING; PARALLEL PROCESSING (COMPUTERS); PROTOTYPES; DATA STRUCTURES; MESSAGES; TILES; PREPROCESSING
Downloads: 76
[texts]Design and Predictions for High-Altitude (Low Reynolds Number) Aerodynamic Flight Experiment - Greer, Donald
A sailplane being developed at NASA Dryden Flight Research Center will support a high-altitude flight experiment. The experiment will measure the performance parameters or an airfoil at high altitudes (70,000 - 100,000 ft), low Reynolds numbers (2 x 10(exp 5) - 7 x 10(exp 5)), and high subsonic Mach numbers (0.5 and 0.65). The airfoil section lift and drag are determined from pilot and static pressure measurements...
Keywords: AUTONOMY; SPECIFICATIONS; GROUND SUPPORT SYSTEMS; AUTOMATIC CONTROL; PROTOTYPES; SPACECRAFT CONTROL
Downloads: 126
[texts]Continuous Risk Management Course - Hammer, Theodore F
This document includes a course plan for Continuous Risk Management taught by the Software Assurance Technology Center along with the Continuous Risk Management Guidebook of the Software Engineering Institute of Carnegie Mellon University and a description of Continuous Risk Management at NASA.
Keywords: ALGORITHMS; PROGRAM VERIFICATION (COMPUTERS); THEOREM PROVING; PROTOTYPES; DOMAINS
Downloads: 276
[texts]Linking Horizontal And Vertical Transports of Biomass Fire Emissions to the Tropical Atlantic Ozone Paradox during the Northern Hemisphere Winter Season: II. 1998-1999. - Jenkins, Gregory S.
The horizontal and vertical transport of biomass fire emissions in West Africa during November 1998 through February 1999, are examined using all available data including wind, fire, aerosol, precipitation, lightning and outgoing longwave radiation. Ozonesonde data from the Aerosols99 Trans-Atlantic cruise are also included with rain and wind analyses. The results here support earlier studies that ozone and ozone precursors associated with biomass burning are confined to the lower troposphere pr...
Keywords: AUTONOMY; DECISION MAKING; INFORMATION ANALYSIS; BEHAVIOR; DECISION THEORY; PROTOTYPES
Downloads: 74
[texts]Phototyping with application generators : lessons learned from the Naval Aviation Logistics Command Management Information System case - Bui, Tung X., 1953-;Blake, Cheryl D.;Emery, James C.
Cover title
Keywords: MANAGEMENT INFORMATION SYSTEMS; NAVAL AVIATION; PROTOTYPES; NAVAL LOGISTICS
Downloads: 31
[texts]Numerical Study of the Role of Shallow Convection in Moisture Transport and Climate - Seaman, Nelson L.
The objective of this investigation was to study the role of shallow convection on the regional water cycle of the Mississippi and Little Washita Basins of the Southern Great Plains (SGP) using a 3-D mesoscale model, the PSU/NCAR MM5. The underlying premise of the project was that current modeling of regional-scale climate and moisture cycles over the continents is deficient without adequate treatment of shallow convection...
Keywords: AUTOMATIC WEATHER STATIONS; OPTICAL RADAR; PROTOTYPES; DEPLOYMENT; ANTARCTIC REGIONS; AUTONOMY
Downloads: 123
[texts]Space Shuttle ET Friction Stir Weld Machines - Thompson, Jack M
NASA and Lockheed-Martin approached the FSW machine vendor community with a specification for longitudinal barrel production FSW weld machines and a shorter travel process development machine in June of 2000. This specification was based on three years of FSW process development on the Space Shuttle External Tank alloys, AL2 195-T8M4 and AL22 19-T87. The primary motivations for changing the ET longitudinal welds from the existing variable polarity Plasma Arc plasma weld process included: (1) Sig...
Keywords: MARS SURFACE; ROVING VEHICLES; INSTRUMENT ORIENTATION; AUTONOMY; PROTOTYPES
Downloads: 137
[texts]Biotechnology Facility: An ISS Microgravity Research Facility - Gonda, Steve R.
The International Space Station (ISS) will support several facilities dedicated to scientific research. One such facility, the Biotechnology Facility (BTF), is sponsored by the Microgravity Sciences and Applications Division (MSAD) and developed at NASA's Johnson Space Center. The BTF is scheduled for delivery to the ISS via Space Shuttle in April 2005. The purpose of the BTF is to provide: (1) the support structure and integration capabilities for the individual modules in which biotechnology e...
Keywords: KERNEL FUNCTIONS; COMPONENT RELIABILITY; SUPERCOMPUTERS; VOIDS; PROTOTYPES; MIGRATION
Downloads: 75
[image]Model No. 98

Keywords: Europe; Shoes; Leather; Metropolitan Museum of Art; French; France; leather, wood; 1939; Prototypes
Downloads: 22
[texts]Aircraft Noise Perception Study in Brazil: A Perspective on Airport Sustainable Growth and Environmental Awareness - deArantesGomesEller, Rogerio
Aircraft noise perception is related to several variables that are tangible and objective, such as the number of operations, flight schedules. Other variables, instead, are more subjective, such as preferences. However, although their elusiveness, they contribute to determine the individuals' perception of this type of externality. Despite the fact that the complaints related to aeronautical noise have been registered since the decade of 50, it has been observed that the perception of noise seem...
Keywords: AUTOMATA THEORY; SOFTWARE ENGINEERING; FORMALISM; COMPUTER PROGRAMMING; PROTOTYPES; ADAPTATION; REACTIVITY; SIMULATION
Downloads: 55
[texts]The NASA master directory quick reference guide - NON
The NASA Master Directory (MD) is a free, online, multidisciplinary directory of space and Earth science data sets (NASA and non-NASA data) that are of potential interest to the NASA-sponsored research community. The MD contains high-level descriptions of data sets, other data systems and archives, and campaigns and projects. It provides mechanisms for searching for data sets by important criteria such as geophysical parameters, time, and spatial coverage...
Keywords: COMPUTER NETWORKS; DATA SYSTEMS; DATA TRANSMISSION; DIRECTORIES; INTERPROCESSOR COMMUNICATION; INFORMATION SYSTEMS; ON-LINE SYSTEMS; PROTOTYPES
Downloads: 58
[image]The Prodigy Brothers On www.u.listen2myradio.com Logo Prototypes - Ainst
Designed By Ainst. 2012
Keywords: The Prodigy Brothers; www.u.listen2myradio.com; Logo; Prototypes
Downloads: 12
[texts]Financial issues for commercial space ventures: Paying for the dreams - Egan, J. J
Various financial issues involved in commercial space enterprise are discussed. Particular emphasis is placed on the materials processing area: the current state of business plan and financial developments, what is needed for enhanced probability of success of future materials development efforts in attracting financial backing, and finally, the risks involved in this entire business area.
Keywords: DISPLAY DEVICES; PERIPHERAL VISION; AIRCRAFT MANEUVERS; ATTITUDE INDICATORS; EVALUATION; FLIGHT TESTS; PROTOTYPES; ROLL
Downloads: 72
[texts]A Catalog of Soft X-Ray Shadows, and More Contemplation of the 1/4 KeV Background - Snowden, S. L.
This paper presents a catalog of shadows in the 1/4 keV soft X-ray diffuse background 4 (SXRB) that were identified by a comparison between ROSAT All-Sky Survey maps and DIRB&corrected IRAS 100 micron maps. These ''shadows'' are the negative correlations between the surface brightness of the SXRB and the column density of the Galactic interstellar medium (ISIM) over limited angular regions (a few degrees in extent)...
Keywords: SYSTEMS ENGINEERING; DATA MANAGEMENT; BIBLIOGRAPHIES; DATA BASES; PROTOTYPES; INTERNETS; SUBROUTINE LIBRARIES (COMPUTERS)
Downloads: 100
[texts]Prototyping hard real-time Ada systems in a classroom environment - Luqi.;Shing, Man-Tak.;Barnes, P.;Hughes, G.
Title from cover
Keywords: ADA PROGRAMMING LANGUAGE; PROTOTYPES; REAL TIME; COMPUTER AIDED DESIGN; TEACHING METHODS
Downloads: 61
[texts]Improved composite material and method for production of improved composite material - NON
A laminated composite material with improved interlaminar strength and damage tolerance having short rods distributed evenly throughout the composite material perpendicular to the laminae is introduced. Each rod is shorter than the thickness of the finished laminate, but several times as long as the thickness of each lamina. The laminate is made by inserting short rods in layers of prepreg material, and then stacking and curing prepreg material with rods inserted therethrough.
Keywords: ARTIFICIAL INTELLIGENCE; MAN MACHINE SYSTEMS; ROBOTICS; ROBOTS; AUTONOMY; MACHINE LEARNING; MOBILITY; PROBLEM SOLVING; PROTOTYPES
Downloads: 87
[texts]UTILIZATION OF WIND POWER IN AGRICULTURE IN THE USSR - STEIN, D
WIND MOTORS ARE BEING USED IN RUSSIAN AGRICULTURE FOR MILLING AND PUMPING WATER. PLANS CALL FOR RAPID EXPANSION OF THE UTILIZATION OF SUCH POWER PLANTS. THE EXTENT OF PRESENT UTILIZATION, PROBLEMS, AND FORECASTS ARE OUTLINED.
Keywords: ACTUATORS; DIGITAL SYSTEMS; ELECTRIC CONTROL; HYDRAULIC CONTROL; AIRCRAFT CONTROL; CONTROL SURFACES; CONTROL VALVES; PROTOTYPES; RELIABILITY ENGINEERING
Downloads: 127
[texts]Axisymmetric Two-Dimensional Computation of Magnetic Field Dragging in Accretion Disks - Reyes-Ruiz, Mauricio
In this paper we model a geometrically thin accretion disk interacting with an externally imposed, uniform, vertical magnetic field. The accretion flow in the disk drags and distorts field lines, amplifying the magnetic field in the process. Inside the disk the radial component of the field is sheared into a toroidal component. The aim of this work is to establish the character of the resultant magnetic field and its dependence on the disk's parameters...
Keywords: FAILURE; EXPERIMENTATION; DATA PROCESSING; INJECTION; EVALUATION; COMPLEX SYSTEMS; ARCHITECTURE (COMPUTERS); CRASHES; DESTRUCTION; ERRORS; PROTOTYPES
Downloads: 71
[texts]Contributions of Tropical Cyclones to the North Atlantic Climatological Rainfall as Observed from Satellites - Rodgers, Edward B.
The tropical cyclone rainfall climatology study that was performed for the North Pacific was extended to the North Atlantic. Similar to the North Pacific tropical cyclone study, mean monthly rainfall within 444 km of the center of the North Atlantic tropical cyclones (i.e., that reached storm stage and greater) was estimated from passive microwave satellite observations during, an eleven year period...
Keywords: PROTECTIVE CLOTHING; TECHNOLOGY TRANSFER; FIRE FIGHTING; EXTRAVEHICULAR ACTIVITY; SPACE SUITS; FLAMMABILITY; PROTOTYPES; TECHNOLOGY UTILIZATION
Downloads: 106
[texts]Star Formation as Seen by the Infrared Array Camera on Spitzer - Smith, Howard A.
The Infrared Array Camera (IRAC) onboard Spitzer has imaged regions of star formation (SF) in its four IR bands with spatial resolutions of approximately 2''/pixel. IRAC is sensitive enough to detect very faint, embedded young stars at levels of tens of Jy, and IRAC photometry can categorize their stages of development: from young protostars with infalling envelopes (Class 0/1) to stars whose infrared excesses derive from accreting circumstellar disks (Class 11) to evolved stars dominated by pho...
Keywords: SITUATIONAL AWARENESS; AIRCRAFT INSTRUMENTS; DISPLAY DEVICES; HELICOPTERS; EXPERT SYSTEMS; AIRCRAFT PILOTS; PILOT TRAINING; HYDRAULIC EQUIPMENT; PROTOTYPES
Downloads: 88
[texts]Substitution Effects and Linear Free Energy Relationships during Reduction of 4- Benzoyl-N-(4-substituted benzyl)pyridinium Cations - Leventis, Nicholas
In analogy to 4-(para-substituted benzoyl)-N-methylpyridinium cations (1-X's), the title species (2-X's, -X = -OCH3, -CH3, -H, -Br, -COCH3, -NO2) undergo two reversible, well-separated (E(sub 1/2) greater than or equal to 650 mV) one-electron reductions. The effect of substitution on the reduction potentials of 2-X's is much weaker than the effect of the same substituents on 1-X's: the Hammett rho-values are 0.80 and 0.93 for the 1st- and 2nd-e reduction of 2-X's vs...
Keywords: ARCHITECTURE (COMPUTERS); PARALLEL COMPUTERS; INTERFACES; RELIABILITY ANALYSIS; COMPUTER TECHNIQUES; SEQUENTIAL COMPUTERS; PROTOTYPES; CYCLES
Downloads: 91
[texts]Thermographic Characterization of Impact Damage in SiC/SiC Composite Materials - Fox, Dennis S.
SiC/SiC composite materials targeted as turbine components for next-generation aero-engines are being investigated at NASA Glenn Research Center. In order to examine damage mechanisms in these materials, SiC/SiC coupons were impacted with 1.59 mm diameter steel spheres at increasing velocities from 115 m/s to 400 m/s. Pulsed thermography, a nondestructive evaluation technique that monitors the thermal response of a sample over time, was utilized to characterize the impact damage...
Keywords: PRODUCT DEVELOPMENT; TECHNOLOGY UTILIZATION; OXYGEN ATOMS; CLEANING; AEROSPACE TECHNOLOGY TRANSFER; PROTOTYPES; ORGANIC MATERIALS; RESIDUES
Downloads: 122
[texts]Estimating the Thickness of Sea Ice Snow Cover in the Weddell Sea from Passive Microwave Brightness Temperatures - Arrigo, K. R.
Passive microwave satellite observations have frequently been used to observe changes in sea ice cover and concentration. Comiso et al. showed that there may also be a direct relationship between the thickness of snow cover (h(sub s)) on ice and microwave emissivity at 90 GHz. Because the in situ experiment of experiment of Comiso et al. was limited to a single station, the relationship is re-examined in this paper in a more general context and using more extensive in situ microwave observations...
Keywords: SCIENTIFIC VISUALIZATION; COMPUTER PROGRAMS; DATA ACQUISITION; FRAMES (DATA PROCESSING); COMPUTER AIDED DESIGN; DOMAINS; DATA BASES; PROTOTYPES
Downloads: 74
[texts]The Role of Habitability Studies in Space Facility and Vehicle Design - Adams, Constance M
This document is a viewgraph presentation which reviews the role of the space architect in designing a space vehicle with habitability as a chief concern. Habitability is composed of the qualities of the environment or system which support the crew in working and living. All the impacts from habitability are interdependent; i.e., impacts to well-being can impact performance, safety or efficiency. After reviewing the issues relating to habitability the presentation discusses the application of th...
Keywords: AUTOMATIC CONTROL; FAILURE; FALSE ALARMS; TRAJECTORIES; AIRSPACE; ERRORS; MONTE CARLO METHOD; PROTOTYPES
Downloads: 68
[texts]Portable prototype tube flare inspection instrument. Phase I - Design Progress report, 1 Jul. - 1 Dec. 1965 - NON
Design and breadboarding of portable tube flare inspection instrument
Keywords: ELECTRON TUBES; FIXTURES; INSPECTION; OPTICAL MEASUREMENT; PROTOTYPES; STRUCTURAL DESIGN; ELECTRON TUBE; OPTICAL MEASUREMENT; STRUCTURAL DESIGN
Downloads: 153
[texts]Eyeglass Filters - NON
Biomedical Optical Company of America's suntiger lenses eliminate more than 99 of harmful light wavelengths. NASA derived lenses make scenes more vivid in color and also increase the wearer's visual acuity. Distant objects, even on hazy days, appear crisp and clear; mountains seem closer, glare is greatly reduced, clouds stand out. Daytime use protects the retina from bleaching in bright light, thus improving night vision...
Keywords: INDUSTRIES; STEELS; THERMAL CONDUCTIVITY; TECHNOLOGY UTILIZATION; THERMAL FATIGUE; EROSION; PROTOTYPES; SPRAYING
Downloads: 76
[texts]Endpoint Security Using Biometric Authentication for Secure Remote Mission Operations - Donohue, John T.
We propose a flexible security authentication solution for the spacecraft end-user, which will allow the user to interact over Internet with the spacecraft, its instruments, or with the ground segment from anywhere, anytime based on the user's pre-defined set of privileges. This package includes biometrics authentication products, such as face, voice or fingerprint recognition, authentication services and procedures, such as: user registration and verification over the Internet and user database...
Keywords: PROTOTYPES; ARCHITECTURE (COMPUTERS); SIMULATORS; SIMULATION; INTERFACES; TECHNOLOGY ASSESSMENT; COST REDUCTION; RISK
Downloads: 91
[texts]Planetary Protection Issues in the Human Exploration of Mars - Criswell, Marvin E.
This workshop report, long delayed, is the first 21st century contribution to what will likely be a series of reports examining the effects of human exploration on the overall scientific study of Mars. The considerations of human-associated microbial contamination were last studied in a 1990 workshop (''Planetary Protection Issues and Future Mars Missions,'' NASA CP-10086, 1991), but the timing of that workshop allowed neither a careful examination of the full range of issues, nor an appreciatio...
Keywords: HUMAN FACTORS ENGINEERING; SAFETY FACTORS; SYSTEMS ENGINEERING; MATHEMATICAL MODELS; AIR TRANSPORTATION; SIMULATION; PROTOTYPES; THEOREM PROVING
Downloads: 75
[texts]Tailoring Silicon Oxycarbide Glasses for Oxidative Stability - Hurwitz, F. I.
Blackglas(Trademark) polysiloxane systems produce silicon oxycarbide glasses by pyrolysis in inert atmosphere. The silicon oxycarbides evidence oxidative degradation that limits their lifetime as composite matrices. The present study characterizes bonding rearrangements in the oxycarbide network accompanying increases in pyrolysis temperature. It also addresses the changes in susceptibility to oxidation due to variations in the distribution of Si bonded species obtained under different processin...
Keywords: AMPLIFIER DESIGN; OPERATIONAL AMPLIFIERS; TRANSDUCERS; SIGNAL PROCESSING; PRODUCT DEVELOPMENT; PROTOTYPES; MINIATURIZATION; TECHNOLOGY UTILIZATION; RANDOM ACCESS MEMORY
Downloads: 116
[texts]Phase 1 Space Fission Propulsion System Design Considerations - Houts, Mike
Fission technology can enable rapid, affordable access to any point in the solar system. If fission propulsion systems are to be developed to their full potential; however, near-term customers must be identified and initial fission systems successfully developed, launched, and operated. Studies conducted in fiscal year 2001 (IISTP, 2001) show that fission electric propulsion (FEP) systems operating at 80 kWe or above could enhance or enable numerous robotic outer solar system missions of interes...
Keywords: WIND TUNNELS; DATA STORAGE; SUPERCOMPUTERS; WIND TUNNEL TESTS; COMPUTATIONAL GRIDS; PROTOTYPES; FLOW VISUALIZATION
Downloads: 79
[texts]A device for testing cables - NON
A device for testing current paths is attachable to a conductor. The device automatically checks the current paths of the conductor for continuity of a center conductor, continuity of a shield, and a short circuit between the shield and the center conductor. The device includes a pair of connectors and a circuit to provide for testing of the conductive paths of a cable to be tested with the circuit paths of the circuit...
Keywords: ADAPTIVE OPTICS; TRANSMISSION; PHASED ARRAYS; SYSTEMS INTEGRATION; TELESCOPES; APERTURES; LASER BEAMS; MIRRORS; PROTOTYPES; TEST FACILITIES
Downloads: 105
[texts]The Effect of Impacts on the Early Martian Climate - Colaprete, A.
The first images returned by the Mariner 7 spacecraft of the Martian surface showed a landscape heavily scared by impacts. Mariner 9 imaging revealed geomorphic features including valley networks and outflow channels that suggest liquid water once flowed at the surface of Mars. Further evidence for water erosion and surface modification has come from the Viking Spacecraft, Mars Pathfinder, Mars Global Surveyor's (MGS) Mars Orbiter Camera (MOC), and Mars Odyssey's THEMIS instrument...
Keywords: AUTONOMY; SENSITIVITY ANALYSIS; GAIT; ROBOTS; GENETIC ALGORITHMS; DYNAMIC CONTROL; WALKING; PROTOTYPES; CONSUMERS; SENSORS
Downloads: 73
[texts]A Formal Methods Approach to the Analysis of Mode Confusion - Butler, Ricky W.
The goal of the new NASA Aviation Safety Program (AvSP) is to reduce the civil aviation fatal accident rate by 80% in ten years and 90% in twenty years. This program is being driven by the accident data with a focus on the most recent history. Pilot error is the most commonly cited cause for fatal accidents (up to 70%) and obviously must be given major consideration in this program. While the greatest source of pilot error is the loss of situation awareness , mode confusion is increasingly becom...
Keywords: DATA CONVERSION ROUTINES; INFORMATION RETRIEVAL; COMPUTER PROGRAMS; PROTOTYPES; ON-LINE SYSTEMS; LIBRARIES; DIGITAL TECHNIQUES; CD-ROM
Downloads: 63
[texts]Characterization of Unsteady Flow Structures Around Tandem Cylinders for Component Interaction Studies in Airframe Noise - Jenkins, Luther N.
A joint computational and experimental study has been performed at NASA Langley Research Center to investigate the unsteady flow generated by the components of an aircraft landing gear system. Because the flow field surrounding a full landing gear is so complex, the study was conducted on a simplified geometry consisting of two cylinders in tandem arrangement to isolate and characterize the pertinent flow phenomena...
Keywords: TECHNOLOGY UTILIZATION; VOLTAGE CONVERTERS (DC TO DC); CRYOGENICS; PROTOTYPES; EFFICIENCY; NASA SPACE PROGRAMS
Downloads: 106
[texts]MEASUREMENT OF WIND AND TEMPERATURE IN THE UPPER ATMOSPHERE - VILLAIN, J
THE METHODS USED TO PLOT THE WIND, INCLUDING THE LIMITS AND THE ACCURACY ACHIEVED ARE DESCRIBED ALONG WITH AN EXAMINATION OF THE CORRECTIONS WHICH APPLY TO THE TERMS OF THE GENERAL EQUATION OF EQUILIBRIUM OF A THERMISTOR. THE LIMITED VALUES OF THESE CORRECTIONS AS FUNCTIONS OF THE SOUNDING CONDITIONS ARE ESTIMATED AND COMPARED AMONG THEMSELVES TO DETERMINE THE MOST SUITABLE METHODS OF EXPLOITATION.
Keywords: GAS ANALYSIS; LABORATORY EQUIPMENT; PROTOTYPES; RESIDUAL GAS; AIRBORNE EQUIPMENT; ELECTROMETERS; ELECTRONIC EQUIPMENT; IONS; SYSTEMS ENGINEERING
Downloads: 123
[texts]Nonlinear and Buckling Behavior of Curved Panels Subjected to Combined Loads - Hilburger, Mark W.
The results of an analytical study of the nonlinear and buckling response characteristics of curved panels subjected to combined loads are presented. Aluminum and laminated composite panels are considered in the study and a flat and shallow curved panel configurations are considered as well. The panels are subjected to combined axial compression and transverse tension or compression loads or combined axial compression and inplane shear loads...
Keywords: CONTAMINANTS; PROTOTYPES; TRANSMITTANCE; OXYGEN ATOMS; COMPUTERIZED SIMULATION; SURFACE REACTIONS; DEGRADATION; SPACECRAFT COMPONENTS; SILICONES; COMPUTER PROGRAMS
Downloads: 143
[texts]Manpower and project planning - Johnson, David W
The purpose was to study how manpower and projects are planned at the Facilities Engineering Division (FENGD) within the Systems Engineering and Operations Directorate of the LaRC and to make recommendations for improving the effectiveness and productivity ot the tools that are used. The existing manpower and project planning processes (including the management plan for the FENGD, existing manpower planning reports, project reporting to LaRC and NASA Headquarters, employee time reporting, financ...
Keywords: COMPUTER SYSTEMS PROGRAMS; PROJECT MANAGEMENT; SPACE TRANSPORTATION; COMPUTER PROGRAMS; DATA ACQUISITION; INFORMATION DISSEMINATION; PRODUCTIVITY; PROTOTYPES
Downloads: 129
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